Histologically, the cardiac conduction network is formed of electrically isolated subendocardial fibers that comprise specialized cells with fewer myofibrils and mitochondria than cardiomyocytes. Our aim is to uncover regional variations of cardiac conduction fibers through histological and morphometric study in a porcine and human model. We analyzed five male adult human hearts and five male pig hearts. The left ventricles were dissected and sectioned in the axial plane into three parts basal, middle third and apex regions. Cardiac conduction fibers study was carried out using hematoxylin-eosin and Masson's trichrome staining, and cardiac conduction cells and their junctions were identified using desmin, and a PAS method. Cardiac conduction fibers were difficult to pinpoint in humans, mostly showing a darker color or equal to cardiomyocytes. Cardiac conduction fibers in humans were in the subendocardium and in pigs in the myocardium and subendocardium. Cardiac conduction fibers were located mainly in the septal region in both humans and pigs. In our morphometric analysis, we were able to determine that cardiac conduction cells in humans (18.52 +/- 5.41 μm) and pigs (21.32 +/- 6.45 μm) were large, compared to cardiomyocytes. Conduction fiber-myocardial junctions were present in 10% in humans and 24.2% in pigs. The performance of immunohistochemical methods made it possible to improve the identification of cardiac conduction cells in the species studied. Study of cardiac conduction fibers and cells and their myocardial junctions is vital to gain insight into their normal distribution in the species analyzed, and thus advance the use of pigs in experimental models of the cardiac conduction system in humans.Post-mortem biochemistry, including the analysis of beta-hydroxybutyrate (BHB), is increasingly employed in forensic medicine, especially in conditions such as diabetes and chronic alcoholism. However, not much is known about the associations between age, body mass index (BMI), and sex and BHB concentrations in ketoacidotic conditions.
To retrospectively study the association between age, BMI and sex in several conditions, such as diabetic ketoacidosis (DKA), alcoholic ketoacidosis (AKA), and elevated post-mortem BHB concentrations.
1407 forensic autopsy cases analysed for BHB were grouped by diagnosis DKA, AKA, HHS [hyperosmolar hyperglycaemic state], acidosis NOS [not otherwise specified], or hypothermia. Age, sex, BMI and the concentrations of blood alcohol, vitreous glucose and blood BHB were recorded.
Cases of AKA and DKA were most numerous (184 and 156, respectively). In DKA and in its male subgroup, cases with severe ketosis (BHB&gt;1000?g/g) were younger and had a lower BMI than those with moderate ketosis (BHB 250-1000?g/g) and controls (P&lt;0.001). In DKA and in its female subgroup, cases with moderate ketosis cases were older (P=0.0218 and P=0.0083) than controls. https://www.selleckchem.com/products/7acc2.html In AKA and in its male subgroup, cases with severe ketosis had a lower BMI than those with moderate ketosis (P=0.0391 and P=0.0469) and controls (P&lt;0.001). Cases with moderate ketosis had a lower BMI than controls (P&lt;0.001).
BHB concentration is associated with BMI in DKA and AKA, and with both BMI and age in DKA. Constitutional factors should, therefore, be considered in potential AKA and DKA cases.
BHB concentration is associated with BMI in DKA and AKA, and with both BMI and age in DKA. Constitutional factors should, therefore, be considered in potential AKA and DKA cases.In temperature based death time estimation, the mathematical description by Marshall and Hoare is combined with the parameters defined and additional correction factors introduced by Henssge in the Nomogram method (summarized as MHH). Parameters and correction factors however leave room for subjectivity and disagreement. Elevation of rectal temperature at the time of death has been acknowledged as problematic for death time estimation in several studies, but has neither been solved nor systematically integrated into death time estimation methodology. Ambient temperature, when non-constant and/or unknown, may introduce additional errors. Further problems may arise if the fundamental relationship between torso dimensions and total body weight is not comparable to Henssge's dummy cooling model. In this study we present a novel methodological approach to temperature based death time estimation, in which relevant parameters for calculations may be evaluated, corrected and generated using brute-force calculations. Consistency of death time over the course of cooling is used as brute-force target. The calculations produce momentary cooling weights, which are graphed over time. Cooling weight graphs can be analyzed to draw conclusions related to different parameters. The method was used on artificial ideal cooling data which was generated according to MHH for known parameters. Correctness of assumed parameters was confirmed by a linear horizontal path of the cooling weight graph. However, controlled false value input resulted in characteristic graph variations. Elevated rectal temperature at the time of death was detectable from the curve shape until hours after cooling below regular temperature at death. False high and false low ambient temperature produced positive and negative curve slopes. Overall, the method acts much like a prism which breaks up light into its elemental colors. It holds potential for application both in scientific settings and practical case work.Cancer therapy targets specific metabolic pathways or a single gene. This may result in low therapeutic effects due to drug selectivity and drug resistance. Recent studies revealed that the mitochondrial membrane potential and transmembrane permeability of cancerous mitochondria are differed from normal mitochondria. Thus, chemotherapy targeting cancerous mitochondria could be an innovative and competent strategy for cancer therapy. Previously, our work with a novel group of mitochondria targeting small molecules presented promising inhibitory capability toward various cancer cell lines and suppressed adenosine triphosphate (ATP) generation. Therefore, it is critical to understand the anticancer effect and targeting mechanism of these small molecules. This study investigated the inhibitory activity of mitochondria targeting small molecules with human cervical cancer cells - HeLa to further explore their therapeutic potential. HeLa cells were exposed to 10 ?M of synthesized compounds and presented elevation in intracellular reactive oxygen species (ROS) level, impaired mitochondrial membrane potential and upregulation of apoptosis as well as necrosis.